Compositions – Light transmission modifying compositions – Modification caused by energy other than light
Patent
1993-10-21
1996-02-13
Tucker, Philip
Compositions
Light transmission modifying compositions
Modification caused by energy other than light
252962, 106493, 106499, G02F 100, C08K 500
Patent
active
054909562
ABSTRACT:
There are provided a thermochromic opaque composition capable of exhibiting change in transparency together with change in color in response to temperature variation, a laminate member employing the same, and a three-dimensional article capable of concealing and revealing the interior, utilizing the laminate member. The thermochromic oaque composition is formed by dispersing a thermochromic material, capable of developing and erasing color by an electron donating-accepting reaction, in small particles in vinyl chloride-vinyl acetate matrix resin. The above-mentioned structure realizes reversible change in transparency, together with change in color, in response to temperature variation, with hysteresis with a temperature difference of 10.degree. C. at minimum to 50.degree. C. between the high and low trigger temperatures.
REFERENCES:
patent: 4028118 (1977-06-01), Nakasuji et al.
patent: 4421560 (1983-12-01), Kito et al.
patent: 4601588 (1986-07-01), Takahara et al.
patent: 4732810 (1988-03-01), Kito et al.
patent: 4826550 (1989-05-01), Shimizu et al.
Hayashi Hiroyuki
Kito Tsutomu
Senga Kuniyuki
Pilot Ink Co., Ltd.
Tucker Philip
LandOfFree
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